Organic light-emitting display panel and organic light-emitting display device having built-in touchscreen

ABSTRACT

An organic light-emitting display panel having a built-in touchscreen includes a plurality of subpixels defined therein by a plurality of data lines and a plurality of gate lines, an encapsulation layer having an encapsulating function, and a color filter layer located on the encapsulation layer. An organic light-emitting display device includes the organic light-emitting display panel. Both the organic light-emitting display panel having a built-in touchscreen and the organic light-emitting display device having a built-in touchscreen is provided with a structure enabling a touchscreen disposed therewithin.

CROSS REFERENCE TO RELATED APPLICATIONS

This application claims priority from Republic of Korea PatentApplication No. 10-2016-0122496 filed on Sep. 23, 2016, which is herebyincorporated by reference for all purposes as if fully set forth herein.

BACKGROUND Field

The present disclosure relates to an organic light-emitting displaypanel and an organic light-emitting display device having a built-intouchscreen.

Description of Related Art

In response to the development of the information society, demand for avariety of display devices for displaying images is increasing. In thisregard, a range of display devices, such as liquid crystal display (LCD)devices, plasma display panels (PDPs), and organic light-emittingdisplay devices, have recently come into widespread use.

Many display devices provide touch-based user interfaces enabling usersto intuitively and conveniently input data or instructions directly todevices, rather than using conventional data input systems, such asbuttons, a keyboard, or a mouse.

To provide such touch-based user interfaces, the ability to sense touchfrom a user and accurately detect touch coordinates is required.

In this regard, the related art enables touch sensing using a touchsensing method selected from among a variety of touch sensing methods,such as touch sensing using a resistive film, capacitive touch sensing,electromagnetic induction touch sensing, infrared (IR) touch sensing,and ultrasonic touch sensing.

In this regard, capacitance touch sensing is commonly used to sense atouch and touch coordinates using a plurality of touch electrodesdisposed on a touch panel as touch sensors, based on a change incapacitance between touch electrodes or between a touch electrode and apointer, such as a finger.

A range of attempts at disposing a touchscreen panel includingelectrodes in a display panel have been made in order to facilitate thefabrication of display devices and reduce the sizes of display devices.

Among a variety of display devices, organic light-emitting displaydevices can be fabricated to be relatively light and thin, since organicelectroluminescent (EL) devices or organic light-emitting diodes (OLEDs)that are able to emit light themselves are used therein and a separatelight source is not required.

In addition, organic light-emitting display devices are not onlyadvantageous in terms of power consumption, since they are driven at lowvoltages, but also have desirable qualities, such as the ability toimplement a range of colors of light, rapid response rates, wide viewingangles, and high contrast ratios. Thus, organic light-emitting displaydevices for next-generation displays have been actively researched.

Although organic light-emitting display devices are significantlyadvantageous in terms of display, there are significant difficulties anda range of limitations regarding touchscreen panels to be disposedwithin organic light-emitting display devices.

For example, an encapsulation layer or the like for protecting theorganic light-emitting display panel from moisture, air, physicalimpacts, or impurities that would be created during fabricationprocessing is provided on the front surface of the organiclight-emitting display panel to make the organic light-emitting displaypanel reliable. However, this consequently causes processing to berelatively complicated and difficult. In addition, the encapsulationlayer makes it difficult to determine the positions of touch sensors,with which touch sensing can be normally performed, without loweringdisplay performance.

In addition, in fabrication processing of an organic light-emittingdisplay panel, organic materials limit the degree of high temperatureprocessing by which touch sensors formed of a metal material aremanufactured within the organic light-emitting display panel.

Due to the limitations of organic light-emitting display panelsregarding structural characteristics and processing, it is difficult todispose touch electrodes acting as touch sensors within organiclight-emitting display panels. That is, it is significantly difficult torealize organic light-emitting display panels having a built-intouchscreen panel.

Thus, in organic light-emitting display devices of the related art, atouch structure has been realized by attaching a touchscreen panel to anorganic light-emitting display panel rather than disposing thetouchscreen panel within the organic light-emitting display panel.

In such a case, the touchscreen panel is fabricated separately from theorganic light-emitting display panel before being attached to theorganic light-emitting display panel, thereby leading to a fabricationprocess that is relatively complicated and results in an increase in thethickness of a resultant organic light-emitting display device, both ofwhich are problematic.

SUMMARY

Various aspects of the present disclosure provide an organiclight-emitting display panel having a built-in touchscreen and anorganic light-emitting display device having a built-in touchscreen,each of which has a structure enabling a touchscreen disposedtherewithin.

Also provided are an organic light-emitting display panel having abuilt-in touchscreen and an organic light-emitting display device havinga built-in touchscreen, each of which is able to improve touch sensingperformance.

Also provided are an organic light-emitting display panel having abuilt-in touchscreen and an organic light-emitting display device havinga built-in touchscreen, each of which has a structure enabling anultrathin profile to be designed.

Also provided are an organic light-emitting display panel having abuilt-in touchscreen and an organic light-emitting display device havinga built-in touchscreen, each of which has a touchscreen panel disposedtherewithin without display performance being influenced.

According to an aspect of the present disclosure, provided is an organiclight-emitting display panel having a built-in touchscreen.

The organic light-emitting display panel may include a plurality ofsubpixels defined therein by a plurality of data lines and a pluralityof gate lines, and a touch sensor (such as touch electrodes) builttherein.

According to another aspect of the present disclosure, an organiclight-emitting display device having a built-in touchscreen may includethe organic light-emitting display panel having a built-in touchscreen.

The organic light-emitting display device may further include a touchsensing circuit supplying a touch driving signal to at least one touchelectrode among the plurality of touch electrodes and sensing at leastone of a touch and a touched position based on a signal detected usingeach of the plurality of touch electrodes to which the touch drivingsignal is applied.

The organic light-emitting display panel may further include anencapsulation layer and a color filter layer located on theencapsulation layer.

In the organic light-emitting display panel, the plurality of touchelectrodes, corresponding to touch sensor metals, may be located on theencapsulation layer.

In the organic light-emitting display panel, a plurality of touch linesmay be located on the encapsulation layer to electrically connect theplurality of touch electrodes to the touch sensing circuit, theplurality of touch lines acting as the touch sensor metals.

In the organic light-emitting display panel, the plurality of touchelectrodes and the plurality of touch lines, corresponding to the touchsensor metals, may be disposed on the same layer.

In the organic light-emitting display panel, the plurality of touchlines may not overlap with the plurality of touch electrodes.

In the organic light-emitting display panel, the plurality of touchelectrodes may be disposed between the encapsulation layer and the colorfilter layer.

In this case, the organic light-emitting display panel may furtherinclude an overcoat layer disposed between the encapsulation layer andthe color filter layer. The plurality of touch electrodes may bedisposed between the encapsulation layer and the overcoat layer.

In the organic light-emitting display panel, the plurality of touchelectrodes may be disposed on the color filter layer.

In this case, an overcoat layer may be disposed on the color filterlayer. The plurality of touch electrodes may be disposed on the overcoatlayer.

According to further another aspect of the present disclosure, anorganic light-emitting display panel having a built-in touchscreen mayinclude a plurality of subpixels defined therein by a plurality of datalines and a plurality of gate lines, and a touch sensor built therein.

In the organic light-emitting display panel, each of the plurality ofsubpixels may include an organic light-emitting diode including a firstelectrode, an organic light-emitting layer, and a second electrode. Eachof the plurality of subpixels may also include a driving transistordriving the organic light-emitting diode, a first transistorelectrically connected between a first node of the driving transistorand a data line among the plurality of data lines corresponding thereto,and a storage capacitor electrically connected between the first nodeand a second node of the driving transistor.

The organic light-emitting display panel may further include anencapsulation layer located on the second electrode of the organiclight-emitting diode, and a color filter layer located on theencapsulation layer.

In the organic light-emitting display panel, a plurality of touchelectrodes may be located on the encapsulation layer.

A touch driving signal may be supplied to at least one touch electrodeamong the plurality of touch electrodes. The touch electrode to whichthe touch driving signal is applied may form capacitance together with apointer corresponding to a touch operation means of a user.

It is possible to sense either a touch or a touched position usingcapacitance that has been formed as described above.

According to the present disclosure as set forth above, the organiclight-emitting display panel having a built-in touchscreen and theorganic light-emitting display device having a built-in touchscreen areprovided with a structure enabling a touchscreen panel to be disposedtherewithin.

In addition, according to the present disclosure, the organiclight-emitting display panel having a built-in touchscreen and theorganic light-emitting display device having a built-in touchscreen canimprove touch sensing performance.

Furthermore, according to the present disclosure, the organiclight-emitting display panel having a built-in touchscreen and theorganic light-emitting display device having a built-in touchscreen areprovided with a structure enabling an ultrathin profile to be designed.

In addition, according to the present disclosure, the organiclight-emitting display panel having a built-in touchscreen and theorganic light-emitting display device having a built-in touchscreen areprovided with a touchscreen panel disposed therewithin without displayperformance being influenced.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other objects, features and advantages of the presentdisclosure will be more clearly understood from the following detaileddescription when taken in conjunction with the accompanying drawings.

FIG. 1 is a schematic view illustrating the configuration of an organiclight-emitting display device having a built-in touchscreen according toexemplary embodiments.

FIG. 2 is a schematic circuit diagram illustrating a subpixel structureof the organic light-emitting display panel having a built-intouchscreen according to exemplary embodiments.

FIG. 3 is a schematic circuit diagram illustrating another subpixelstructure of the organic light-emitting display panel having a built-intouchscreen according to exemplary embodiments.

FIG. 4 is a schematic view illustrating display driving patterns in theorganic light-emitting display panel having a built-in touchscreenaccording to exemplary embodiments.

FIG. 5 is a schematic view illustrating touch sensing patterns in theorganic light-emitting display panel having a built-in touchscreenaccording to exemplary embodiments.

FIG. 6 is a schematic view illustrating a single touch electrode in theorganic light-emitting display panel having a built-in touchscreenaccording to exemplary embodiments.

FIG. 7 is a schematic view illustrating a bulk-type touch electrode inthe organic light-emitting display panel having a built-in touchscreenaccording to exemplary embodiments.

FIG. 8 and FIG. 9 are schematic views illustrating a mesh-type touchelectrode in the organic light-emitting display panel having a built-intouchscreen according to exemplary embodiments.

FIG. 10 is a cross-sectional view illustrating the organiclight-emitting display panel having a built-in touchscreen according toan exemplary embodiment.

FIG. 11 is a schematic view illustrating a color filter-on-encapsulationlayer (COE) structure of the organic light-emitting display panel havinga built-in touchscreen according to exemplary embodiments.

FIG. 12 is a schematic view illustrating a touch sensor-on-encapsulationlayer (TOE) structure of the organic light-emitting display panel havinga built-in touchscreen according to exemplary embodiments.

FIG. 13 is a schematic view illustrating a single touch sensor metallayer-on-encapsulation layer (S-TOE) structure of the organiclight-emitting display panel having a built-in touchscreen according toexemplary embodiments.

FIG. 14 and FIG. 15 are plan views illustrating organic light-emittingdisplay panels having a built-in touchscreen and an S-TOE structureaccording to exemplary embodiments.

FIG. 16 is a schematic view illustrating a first COE and S-TOEcombination structure in the organic light-emitting display panel havinga built-in touchscreen according to exemplary embodiments.

FIG. 17 is a cross-sectional view illustrating the first COE and S-TOEcombination structure in the organic light-emitting display panel havinga built-in touchscreen according to exemplary embodiments.

FIG. 18 is a schematic view illustrating the process steps offabricating the first COE and S-TOE combination structure in the organiclight-emitting display panel having a built-in touchscreen according toexemplary embodiments.

FIG. 19 is a schematic view illustrating a second COE and S-TOEcombination structure in the organic light-emitting display panel havinga built-in touchscreen according to exemplary embodiments.

FIG. 20 is a cross-sectional view illustrating a second COE and S-TOEcombination structure in the organic light-emitting display panel havinga built-in touchscreen according to exemplary embodiments.

FIG. 21 is a schematic view illustrating the process steps offabricating the second COE and S-TOE combination structure in theorganic light-emitting display panel having a built-in touchscreenaccording to exemplary embodiments.

FIG. 22 is a schematic view illustrating the distance defined betweenthe touch electrode and the second electrode and a parasitic capacitancecomponent formed between the touch electrode and the second electrode inthe organic light-emitting display panel having a built-in touchscreenaccording to exemplary embodiments.

FIG. 23 is a schematic view illustrating the distance between the touchelectrode and the second electrode in the organic light-emitting displaypanel having a built-in touchscreen and a first COE and S-TOEcombination structure.

FIG. 24 is a schematic view illustrating the distance between the touchelectrode and the second electrode in the organic light-emitting displaypanel having a built-in touchscreen and a second COE and S-TOEcombination structure.

FIG. 25 is a graph illustrating RC delay and touch sensing performanceaccording to the distance between the touch electrode and the secondelectrode in the organic light-emitting display panel having a built-intouchscreen according to exemplary embodiments.

FIG. 26 is a schematic view illustrating load-free driving for removinga parasitic capacitance component from the organic light-emittingdisplay device having a built-in touchscreen according to exemplaryembodiments.

DETAILED DESCRIPTION OF EMBODIMENTS

Hereinafter, reference will be made to embodiments of the presentdisclosure in detail, examples of which are illustrated in theaccompanying drawings. Throughout this document, reference should bemade to the drawings, in which the same reference numerals and symbolswill be used to designate the same or like components. In the followingdescription of the present disclosure, detailed descriptions of knownfunctions and components incorporated herein will be omitted in the casethat the subject matter of the present disclosure may be renderedunclear thereby.

It will also be understood that, while terms such as “first,” “second,”“A,” “B,” “(a),” and “(b)” may be used herein to describe variouselements, such terms are only used to distinguish one element fromanother element. The substance, sequence, order or number of theseelements is not limited by these terms. It will be understood that whenan element is referred to as being “connected to” or “coupled to”another element, not only can it be “directly connected or coupled to”the other element, but it can also be “indirectly connected or coupledto” the other element via an “intervening” element. In the same context,it will be understood that when an element is referred to as beingformed “on” or “under” another element, not only can it be directlyformed on or under another element, but it can also be indirectly formedon or under another element via an intervening element.

FIG. 1 is a schematic view illustrating the configuration of an organiclight-emitting display device 100 having a built-in touchscreenaccording to an exemplary embodiment.

Referring to FIG. 1, the organic light-emitting display device 100having a built-in touchscreen according to exemplary embodiments canperform a display function to display images and a touch sensingfunction to sense a touch made using a pointer, such as a finger or astylus.

The organic light-emitting display device 100 having a built-intouchscreen according to exemplary embodiments may operate in a displaymode to perform the display function in a display mode section whileoperating in a touch mode to perform the touch sensing function in atouch mode section.

The display mode section and the touch mode section may be divided on atemporal basis, may be simultaneous within the same period of time, ormay overlap on a temporal basis.

That is, the display mode operation for displaying images and the touchmode operation for performing touch sensing can be performed separatelyor simultaneously.

To perform the two functions (i.e. the display function and the touchsensing function), the organic light-emitting display device 100 havinga built-in touchscreen according to exemplary embodiments includes anorganic light-emitting display panel 110 having a built-in touchscreen,a display driving circuit, and a touch sensing circuit TSC. A pluralityof subpixels SP defined by a plurality of data lines DL and a pluralityof gate lines GL are arranged and a plurality of touch electrodes TE aredisposed on the organic light-emitting display panel 110 having abuilt-in touchscreen. The display driving circuit drives the organiclight-emitting display panel 110 having a built-in touchscreen toperform the display function. The touch sensing circuit TSC drives theorganic light-emitting display panel 110 having a built-in touchscreento perform the touch sensing function.

Referring to FIG. 1, the display driving circuit includes a data drivingcircuit DDC to drive the plurality of data lines DL and a gate drivingcircuit GDC to drive the plurality of gate lines GL in the display modesection.

The display driving circuit may further include at least one controllerto control the operation timing of the data driving circuit DDC and thegate driving circuit GDC, the supply of power to the data drivingcircuit DDC and the gate driving circuit GDS, and the like.

Referring to FIG. 1, in the touch mode section, a touch sensing circuitTSC can supply a touch driving signal TDS to at least one touchelectrode among the plurality of touch electrodes TE and determine theoccurrence of a touch and/or a touched position based on a touch sensingsignal TSS detected by the touch electrode TE to which the touch drivingsignal TDS is applied.

The touch sensing circuit TSC includes a touch driving circuit TDC, atouch processor TPR, and the like. The touch driving circuit TDC drivesthe plurality of touch electrodes TE, while the touch processor TPRdetermines the occurrence of a touch and/or a touched position based onsignals received from the touch electrodes TE to which the touch drivingsignals TDS are applied.

The touch driving circuit TDC can supply the touch driving signals TDSto the plurality of touch electrodes TE to drive the plurality of touchelectrodes TE.

In addition, the touch driving circuit TDC can receive touch sensingsignals TSS from the touch electrodes TE to which the touch drivingsignals TDS are supplied.

The touch driving circuit TDC supplies the received touch sensingsignals TSS, or sensing data obtained by processing the received touchsensing signals TSS, to the touch processor TPR.

The touch processor TPR can execute a touch algorithm using the touchsensing signals TSS or the sensing data and determine the occurrence ofa touch and/or the touched position by executing the touch algorithm.

As described above, the organic light-emitting display device 100 havinga built-in touchscreen according to exemplary embodiments uses aself-capacitance based touch sensing method that determines theoccurrence of a touch and/or the touched position by detecting a changein self-capacitance between each of the touch electrodes TE and thepointer.

In the display device 100 having a built-in touchscreen according toexemplary embodiments, the touch driving signals TDS are applied to thetouch electrodes TE and the touch sensing signals TSS are detected usingthe touch electrodes TE.

Since the organic light-emitting display device 100 having a built-intouchscreen according to exemplary embodiments senses a touch using theself-capacitance based touch sensing method as described above, theorganic light-emitting display panel 110 having a built-in touchscreenis includes a self-capacitance based touch sensing structure.

Accordingly, it is not necessary to provide two types of touch sensorelectrodes (i.e. driving electrodes and receiving electrodes) to theorganic light-emitting display panel 110 having a built-in touchscreen,thereby simplifying and facilitating panel fabrication processing toform a touch sensing structure on the organic light-emitting displaypanel 110 having a built-in touchscreen.

The data driving circuit DDC, the gate driving circuit GDC, the touchdriving circuit TDC, and the touch processor TPR as described above arecategorized according to their functions. The data driving circuit DDC,the gate driving circuit GDC, the touch driving circuit TDC, and thetouch processor TPR may be provided separately from each other, oralternatively, two or more thereof may be integrated with each other.

FIG. 2 is a schematic circuit diagram illustrating a subpixel structureof the organic light-emitting display panel 110 having a built-intouchscreen according to an exemplary embodiment, and FIG. 3 is aschematic circuit diagram illustrating another subpixel structure of theorganic light-emitting display panel 110 having a built-in touchscreenaccording to exemplary embodiments.

Referring to FIG. 2, in the organic light-emitting display panel 110having a built-in touchscreen according to exemplary embodiments, eachof the subpixels SP basically includes an organic light-emitting diode(OLED), a driving transistor DRT driving the OLED, a first transistor T1delivering data to a first node N1 of the driving transistor DRTcorresponding to a gate node, and a storage capacitor C1 maintaining adata voltage VDATA corresponding to an image signal voltage or a voltagecorresponding to the data voltage for a period of a single frame.

The OLED includes a first electrode (i.e. an anode or a cathode) E1, anorganic light-emitting layer EL, and a second electrode (i.e. a cathodeor an anode) E2.

For example, a base voltage EVSS is applied to the second electrode E2of the OLED.

The driving transistor DRT drives the OLED by supplying driving currentto the OLED.

The driving transistor DRT has a first node N1, a second node N2, and athird node N3.

The first node N1 of the driving transistor DRT, corresponding to thegate node, is electrically connected to a source node or a drain node ofthe first transistor T1.

The second node N2 of the driving transistor DRT is electricallyconnected to the first electrode E1 of the OLED, and is a source node ora drain node.

The third node N3 of the driving transistor DRT is a node to which adriving voltage EVDD is applied, is electrically connected to a drivingvoltage line DVL through which the driving voltage EVDD is supplied, andis a drain node or a source node.

The driving transistor DRT and the first transistor T1 may be embodiedas n-type transistors or p-type transistors.

The first transistor T1 is electrically connected between a data line DLand the first node N1 of the driving transistor DRT, and is controlledby a scanning signal SCAN applied to the gate node thereof through agate line.

The first transistor T1 is turned on by the scanning signal SCAN todeliver the data voltage VDATA, supplied through the data line DL, tothe first node N1 of the driving transistor.

The storage capacitor C1 is electrically connected between the firstnode N1 and the second node N2 of the driving transistor DRT.

The storage capacitor C1 is an external capacitor intentionally designedto be disposed outside of the driving transistor DRT, instead of being aparasitic capacitor Cgs or Cgd, i.e. an internal capacitor presentbetween the first node N1 and the second node N2 of the drivingtransistor DRT.

Referring to FIG. 3, each of the subpixels SP disposed on the organiclight-emitting display panel according to exemplary embodiments furtherincludes a second transistor T2, in addition to the OLED, the drivingtransistor DRT, the first transistor T1, and the storage capacitor C1.

Referring to FIG. 3, the second transistor T2 is electrically connectedbetween the second node N2 of the driving transistor DRT and a referencevoltage line RVL through which a reference voltage VREF is supplied, andis controlled by a sensing signal SENSE, a type of scanning signal,supplied to the gate node of the transistor T2 thereof.

Since the second transistor T2 is further provided, it is possible tomore effectively control the status of the voltage of the second node N2of the driving transistor DRT of the subpixel SP.

The second transistor T2 is turned on by the sensing signal SENSE toapply the reference voltage VREF, supplied through the reference voltageline RVL, to the second node N2 of the driving transistor DRT.

The subpixel structure illustrated in FIG. 3 is advantageous foraccurately initializing the voltage of the second node N2 of the drivingtransistor DRT and sensing the unique characteristics (e.g. thethreshold voltage or the degree of mobility) of the driving transistorDRT, and the unique characteristics (e.g. the threshold voltage) of theOLED.

The scanning signal SCAN and the sensing signal SENSE may be separategate signals. In this case, the scanning signal SCAN and the sensingsignal SENSE may be applied to the gate node of the first transistor T1and the gate node of the second transistor T2, respectively, throughdifferent gate lines.

Alternatively, the scanning signal SCAN and the sensing signal SENSE maybe identical signals. In this case, the scanning signal SCAN and thesensing signal SENSE may be commonly applied to the gate node of thefirst transistor T1 and the gate node of the second transistor T2.

Hereinafter, a touchscreen built-in structure allowing a touchscreen tobe built in an organic light-emitting display panel that can have theabove-described subpixel structure, as well as an integrated drivingmethod, an integrated driving circuit, and a signal connecting structureassociated with the touchscreen built-in structure, will be described.

In the organic light-emitting display panel 110 having a built-intouchscreen, when the subpixel structure includes the first electrodeE1, the organic light-emitting layer EL disposed on the first electrodeE1, and the second electrode E2 disposed on the organic light-emittinglayer EL, an encapsulation layer may be disposed on the second electrodeE2 to prevent moisture, air, or the like from infiltrating thereinto.

FIG. 4 is a schematic view illustrating display driving patterns in theorganic light-emitting display panel 110 having a built-in touchscreenaccording to exemplary embodiments.

Referring to FIG. 4, each of the subpixels SP may have the subpixelstructure illustrated in FIG. 2 or FIG. 3, and in a display modesection, may be driven by a single data line DL and one or more gatelines GL.

Data pads DP are connected to ends of the data lines DL to electricallyconnect the data lines DL to the data driving circuit DDC.

Referring to FIG. 4, although the size of a single touch electrode TEmay be the same as the size of a single subpixel SP, the size of thesingle touch electrode TE may be greater than the size of a singlesubpixel SP depending on the degrees of efficiency of touch driving andtouch sensing.

FIG. 5 is a schematic view illustrating touch sensing patterns in theorganic light-emitting display panel 110 having a built-in touchscreenaccording to exemplary embodiments.

Referring to FIG. 5, touch sensing patterns (or touch sensor metals),including a plurality of touch electrodes TE, a plurality of touch linesTL, and a plurality of touch pads TP, are disposed on the organiclight-emitting display panel 110 having a built-in touchscreen accordingto exemplary embodiments.

Since the plurality of touch electrodes TE are touch sensors for touchsensing based on self-capacitance, each of the touch electrodes TE actsas both a driving electrode and a receiving electrode (i.e. a sensingelectrode).

In this regard, the plurality of touch electrodes TE are respectivelyelectrically isolated from each other.

In addition, the plurality of touch electrodes TE do not overlap witheach other.

The plurality of touch lines TL are signal lines electrically connectingthe plurality of touch electrodes TE to the touch sensing circuit TSC.

The plurality of touch pads TP are disposed on predetermined ends of theplurality of touch lines TL and are electrically connected to the touchsensing circuit TSC.

FIG. 6 is a schematic view illustrating a single touch electrode amongthe plurality of touch electrodes TE in the organic light-emittingdisplay panel 110 having a built-in touchscreen according to exemplaryembodiments.

Referring to FIG. 6, the single touch electrode TE has a touch drivingsignal TDS supplied through a single touch line TL.

A single subpixel SP operates using a data voltage VDATA suppliedthrough a single data line DL, as well as scanning signals suppliedthrough one or more gate lines GL depending on the structure of thesubpixel SP.

As illustrated in FIG. 6, the size of each of the plurality of touchelectrodes TE is greater than the size of each of the plurality ofsubpixels SP.

For example, the size of a single touch electrode TE may be greater thanthe size of two subpixels SP.

Since the size of a single touch electrode TE is greater than the sizeof two subpixels SP as described above, two or more gate lines GL or twoor more data lines DL may be disposed in an area occupied by each of thetouch electrodes TE.

Since the size of a single touch electrode TE is greater than the sizeof two subpixels SP in the organic light-emitting display panel 110having a built-in touchscreen as described above, the number of theplurality of touch electrodes TE may be reduced. Accordingly, the numberof instances of touch driving in which touch driving signals TDS aresupplied to the touch electrodes TE may be reduced or sensing data maybe reduced, whereby the efficiency of touch sensing may be improved.

However, when the number of the plurality of touch electrodes TE isreduced due to the increased size of the touch electrodes TE, theefficiency of touch sensing may be improved due to reduced sensing data,but the accuracy of touch sensing may be reduced.

Thus, the number and size of the touch electrodes TE are accurately setin consideration of the efficiency and accuracy of touch sensing.

In the touch mode section, touch driving signals TDS supplied to one ormore touch electrodes among the touch electrodes TE or the entirety ofthe touch electrodes TE may be pulse-type signals.

The touch driving signals TDS may be pulse-type signals having awaveform, for example, a spherical wave, a sine wave, or a triangularwave.

The touch driving signals TDS may have a predetermined wavelength,phase, amplitude, or the like.

FIG. 7 is a schematic view illustrating a bulk-type touch electrode TEin the organic light-emitting display panel 110 having a built-intouchscreen according to exemplary embodiments.

Referring to FIG. 7, each of the plurality of touch electrodes TE may bea bulk-type touch electrode without an open area (OA in FIG. 8).

When the touch electrodes TE are bulk-type touch electrodes, the touchelectrodes TE may be transparent electrodes.

When the touch electrodes TE are formed as bulk-type electrodes withoutan open area OA as described above, the touch electrodes TE can beeasily patterned.

In addition, when the touch electrodes TE are embodied as transparentelectrodes, the touch electrodes TE that may have a reduced influence onluminescence performance in subpixel areas can be formed on the organiclight-emitting display panel 110 having a built-in touchscreen.

FIG. 8 and FIG. 9 are schematic views illustrating a mesh-type touchelectrode TE in the organic light-emitting display panel 110 having abuilt-in touchscreen according to exemplary embodiments.

As illustrated in FIG. 8 and FIG. 9, each of the plurality of touchelectrodes TE may be a mesh-type touch electrode having open areas OA.

When the touch electrodes TE are mesh-type touch electrodes, the touchelectrodes TE may be transparent or opaque electrodes.

When the touch electrodes TE are embodied as mesh-type touch electrodes,each of the open areas OA corresponds to a light-emitting area of eachsubpixel SP. That is, the first electrode E1 of each subpixel SP islocated in each open area OA.

As illustrated in FIG. 8, the mesh-type touch electrodes TE or the openareas OA thereof may be diamond shaped, depending on the shape of thearrangement of the subpixels SP.

Alternatively, as illustrated in FIG. 9, the mesh-type touch electrodesTE or the open areas OA thereof may be rectangular, depending on theshape of the arrangement of the subpixels SP.

The mesh-type touch electrodes TE or the open areas OA thereof may havea variety of shapes depending on the shape of the subpixels, rather thanbeing diamond shaped or rectangular.

As described above, the touch electrodes TE that are suitable for thestructure and shape of the subpixels SP without reducing the luminescentefficiency of the subpixels can be formed on the organic light-emittingdisplay panel 110 having a built-in touchscreen.

FIG. 10 is a cross-sectional view illustrating the organiclight-emitting display panel 110 having a built-in touchscreen accordingto exemplary embodiments.

The cross-sectional structure of the organic light-emitting displaypanel 110 having a built-in touchscreen will be described with referenceto FIG. 10.

A polyimide (PI) layer L02 is located on a substrate or a back plateL01.

A buffer layer L03 is located on the polyimide layer L02, and aninterlayer insulating film L04 is located on the buffer layer L03.

A gate layer L05 is located on the interlayer insulating film L04, andgate electrodes or the like may be formed in desired positions on thegate layer L05.

A gate insulating film L06 is located on the gate layer L05.

A source/drain layer L07 is located on the gate insulating film L06.

Signal lines, such as data lines DL and gate lines GL, and thesource/drain electrodes of a variety of transistors may be formed on thesource/drain layer L07.

A protective layer L08 is located on the source/drain layer L07.

A planarization layer L09 is located on the protective layer L08, and afirst electrode layer L10 is located on the planarization layer L09. Thefirst electrode layer L10 has first electrodes E1 formed inlight-emitting positions of subpixels SP.

A bank layer L11 is located on the first electrode layer L10, and anorganic light-emitting layer L12 is located on the bank layer L11.

A second electrode layer L13 is located on the organic light-emittinglayer L12. The second electrode layer L13 is formed commonly in theentirety of subpixel areas.

An encapsulation layer L14 for preventing the infiltration of moisture,air, and the like is located on the second electrode layer L13.

A dam DAM stacked to be higher than surrounding portions to prevent theencapsulation layer L14 from collapsing may be provided on theperipheral portions of the panel 110.

The encapsulation layer L14 may be a single layer or may include two ormore layers stacked on each other.

In addition, the encapsulation layer L14 may be a metal layer or mayhave a multilayer structure in which two or more layers includingorganic and inorganic layers are stacked on each other.

In the implementation illustrated in FIG. 10, the encapsulation layerL14 is a multilayer structure including a first encapsulation layer L14a, a second encapsulation layer L14 b, and a third encapsulation layerL14 c.

Each of the first encapsulation layer L14 a, the second encapsulationlayer L14 b, and the third encapsulation layer L14 c may be an organiclayer and/or an inorganic layer.

Referring to FIG. 10, the thickness of the encapsulation layer L14 maybe adjusted based on consideration of encapsulation performance.

The thickness of the encapsulation layer L14 may have an effect on RCdelay and touch sensing performance (touch sensitivity) with regard totouch driving and touch sensing.

Thus, the thickness of the encapsulation layer L14 is determined inconsideration of RC delay and touch sensing performance (touchsensitivity).

This feature will be described in greater detail with reference to FIG.22 to FIG. 25.

In addition, the organic light-emitting display panel 110 having abuilt-in touchscreen according to exemplary embodiments has a colorfilter-on-encapsulation layer (COE) structure in which a color filterlayer is located on the encapsulation layer L14 and a touchsensor-on-encapsulation layer (TOE) structure in which touch sensormetals, such as touch electrodes TE and touch lines TL, are located onthe encapsulation layer L14.

Hereinafter, the COE structure and the TOE structure will be describedin greater detail.

FIG. 11 is a schematic view illustrating a COE structure of the organiclight-emitting display panel 110 having a built-in touchscreen accordingto exemplary embodiments.

Referring to FIG. 11, the organic light-emitting display panel 110having a built-in touchscreen has an encapsulation layer L14 to preventthe organic materials of OLEDs from being exposed to oxygen, moisture,or the like.

The encapsulation layer L14 may be located on second electrodes E2 ofOLEDs commonly disposed in the area in which the entirety of subpixelsSP are arranged.

The organic light-emitting display panel 110 having a built-intouchscreen further includes a color filter layer CFL located tocorrespond to the first electrode E1 of the OLED. The color filter layerCFL converts white light generated by the organic light-emitting layerEL into light having a different color.

Color filters, such as red color filters, green color filters, and bluecolor filters, are formed in the color filter layer CFL.

Referring to FIG. 11, in the organic light-emitting display panel 110having a built-in touchscreen, the color filter layer CFL is located onthe encapsulation layer L14.

This structure is referred to as the COE structure.

FIG. 12 is a schematic view illustrating a TOE structure of the organiclight-emitting display panel 110 having a built-in touchscreen accordingto exemplary embodiments.

As described above, in the touch mode section, a touch driving signalTDS is supplied to at least one touch electrode TE among the pluralityof touch electrodes TE corresponding to touch sensors disposed in theorganic light-emitting display panel 110 having a built-in touchscreenaccording to exemplary embodiments. The touch electrode TE to which thetouch driving signal TDS is applied can form capacitance(self-capacitance) together with a pointer corresponding to a touchoperation means of a user.

Referring to FIG. 12, the plurality of touch electrodes TE of the touchsensor metals are located on the encapsulation layer L14.

This structure is referred to as the TOE structure.

Since the organic light-emitting display panel 110 having a built-intouchscreen is designed to have the COE structure as described above, itis possible to improve luminescence efficiency, and in some cases, omita circular polarizer. In addition, the use of the TOE structure canallow the organic light-emitting display panel 110 having a built-intouchscreen to provide a touch sensing function without a problem indisplay functionality. In addition, the touchscreen can be built in theorganic light-emitting display panel 110 with reduced complexity inpanel fabrication.

In addition, the touch sensor metals further include the plurality oftouch lines TL through which the plurality of touch electrodes TE areelectrically connected to the touch sensing circuit TSC, in addition tothe plurality of touch electrodes TE.

The plurality of touch lines TL are also located on the encapsulationlayer L14.

Since the touch lines TL, through which the plurality of touchelectrodes TE are electrically connected to the touch sensing circuitTSC, are disposed on the encapsulation layer L14 as described above,signal transmission for touch driving and touch sensing can beefficiently performed.

FIG. 13 is a schematic view illustrating a single touch sensor metallayer-on-encapsulation layer (S-TOE) structure of the organiclight-emitting display panel 110 having a built-in touchscreen accordingto exemplary embodiments.

Referring to FIG. 13, touch sensor metals include a plurality of touchelectrodes TE, a plurality of touch lines TL, and the like.

The plurality of touch electrodes TE and the plurality of touch lines TLmay be disposed in the same layer.

Here, the layer on which the touch sensor metals, including theplurality of touch electrodes TE and the plurality of touch lines TL,are disposed is referred to as a touch sensor metal layer TSML.

The TOE structure in which the plurality of touch electrodes TE and theplurality of touch lines TL are disposed in the same layer as describedabove is referred to as the S-TOE structure.

Since the organic light-emitting display panel 110 having a built-intouchscreen is designed to have the S-TOE structure as described above,the touch sensor metals TE and TL can be formed to be thin, whereby theorganic light-emitting display panel 110 having a built-in touchscreencan be easily embodied to have an ultrathin structure.

FIG. 14 and FIG. 15 are plan views illustrating organic light-emittingdisplay panels 110 having a built-in touchscreen and an S-TOE structureaccording to exemplary embodiments.

FIG. 14 illustrates a case in which the touch electrodes TE aremesh-type touch electrodes having open areas OA.

Two or more subpixels SP may be disposed below each of the touchelectrodes TE.

Thus, each of the touch electrodes TE transmits light emitted from twoor more underlying subpixels SP.

When the touch electrodes TE are mesh-type touch electrodes having openareas OA, each of the open areas corresponds to each light-emitting areaof the subpixels SP.

When the touch electrodes TE are mesh-type touch electrodes having openareas OA, the touch electrodes TE may be transparent electrodes oropaque electrodes.

FIG. 15 illustrates a case in which the touch electrodes TE arebulk-type touch electrodes without open areas OA.

Two or more subpixels SP may be disposed below each touch electrode TE.

Thus, the touch electrode TE transmits light emitted from the two ormore underlying subpixels SP.

In this regard, when the touch electrodes TE are bulk-type touchelectrodes without open areas OA, the touch electrodes TE may betransparent electrodes.

Referring to FIG. 14 and FIG. 15, each of the plurality of touch linesTL is electrically connected to a specific touch electrode TE and is notelectrically connected to the other touch electrodes TE.

Thus, when the plurality of touch lines TL and the plurality of touchelectrodes TE corresponding to the touch sensor metals are disposed onthe same TSML, the plurality of touch lines TL may be disposed to avoidoverlapping the plurality of touch electrodes TE.

Since the plurality of touch lines TL do not overlap with the pluralityof touch electrodes TE as described above, the plurality of touch linesTL may be disposed in the area in which the plurality of touchelectrodes TE are not formed. Thus, in the S-TOE structure in which theplurality of touch lines TL and the plurality of touch electrodes TE,corresponding to the touch sensor metals, are disposed on the same TSML,the touch sensor metals (i.e. the touch electrodes and the touch lines)can operate ordinarily.

In addition, the plurality of touch lines TL corresponding to the touchsensor metals are electrically isolated from each other. Furthermore,the plurality of touch lines TL do not overlap with each other.

In addition, the plurality of touch electrodes TE corresponding to thetouch sensor metals are electrically isolated from each other.Furthermore, the plurality of touch electrodes TE do not overlap witheach other.

Hereinafter, two exemplary COE and S-TOE combination structures will bedescribed, in the case that the organic light-emitting display panel 110having a built-in touchscreen according to exemplary embodiments isdesigned to have the COE structure and the S-TOE structure.

FIG. 16 is a schematic view illustrating a first COE and S-TOEcombination structure in the organic light-emitting display panel 110having a built-in touchscreen according to exemplary embodiments.

Referring to FIG. 16, a TSML comprised of touch sensor metals, includinga plurality of touch electrodes TE and a plurality of touch lines TL, isdisposed between the encapsulation layer L14 and the color filter layerCFL.

Thus, the encapsulation layer L14, the TSML, and color filter layer CFLare sequentially layered.

Since the color filter layer CFL is located above the TSML as describedabove, light that has been color-converted in the color filter layer CFLcan be prevented from being distorted in the touch sensor metal layerTSML. It is therefore possible to reduce the influence of the touchsensing structure on display performance.

FIG. 17 is a cross-sectional view illustrating the first COE and S-TOEcombination structure in the organic light-emitting display panel 110having a built-in touchscreen according to exemplary embodiments.

Referring to FIG. 17, an overcoat layer OCL is disposed between theencapsulation layer L14 and the color filter layer CFL including aplurality of patterned color filters CF.

In the color filter layer CFL, each of the subpixels SP may have a colorfilter CF disposed therein, the color of the color filter CFcorresponding to the color of the subpixel SP.

For example, when subpixels generating red light, subpixels generatinggreen light, and subpixels generating blue light are disposed in theorganic light-emitting display panel 110 having a built-in touchscreen,red color filters CF_R, green color filters CF_G, and blue color filtersCF_B are disposed in the color filter layer CFL.

Black matrices BM may be respectively located between two adjacentsubpixels SP.

Referring to FIG. 17, the touch sensor metals, including the pluralityof touch electrodes TE and the plurality of touch lines TL, are disposedbetween the encapsulation layer L14 and the overcoat layer OCL.

The touch sensor metals further include a plurality of touch pads TPdisposed on predetermined ends of the plurality of touch lines TL, thetouch pads TP being electrically connected to the touch sensing circuitTSC.

FIG. 17 illustrates a case in which the touch electrodes TE aremesh-type touch electrodes having open areas OA.

Referring to FIG. 17, the positions of the open areas OA of the touchelectrodes TE correspond to the positions of the light-emitting areas ofsubpixels SP.

The positions of the light-emitting areas of the subpixels SP correspondto the positions of the first electrodes E1 of the subpixels SP, as wellas the positions of color filters CF corresponding to the subpixels SP.

FIG. 18 is a schematic view illustrating the process steps offabricating the first COE and S-TOE combination structure in the organiclight-emitting display panel 110 having a built-in touchscreen accordingto exemplary embodiments.

Referring to FIG. 18, after an encapsulation layer L14 is formed to havethe structure illustrated in FIG. 10, a touch sensor metal layer TSML isformed on the encapsulation layer L14.

That is, touch sensor metals, including the touch electrodes TE, thetouch lines TL, and the touch pads TP, are formed on the encapsulationlayer L14.

Afterwards, the encapsulation layer L14 having the touch sensor metalsformed thereon is covered with an overcoat layer OCL.

Here, specific touch pads among the plurality of touch pads TP of thetouch sensor metals are exposed to be connected to the touch sensingcircuit TSC.

Afterwards, black matrices BM are formed on the overcoat layer OCL, inpositions corresponding to the boundaries of the subpixels SP.

Afterwards, the color filters CF corresponding to the light-emittingareas of the subpixels SP are patterned.

Since the overcoat layer OCL is formed on the touch sensor metals, suchas the touch electrodes TE and the touch lines TL as described above, itis possible to protect the touch sensor metals TE and TL using theovercoat layer OCL.

FIG. 19 is a schematic view illustrating a second COE and S-TOEcombination structure in the organic light-emitting display panel 110having a built-in touchscreen according to exemplary embodiments.

Referring to FIG. 19, the touch sensor metal layer TSML is disposed onthe color filter layer CFL, in which the touch sensor metals includingthe plurality of touch electrodes TE and the plurality of touch lines TLare located in the touch sensor metal layer TSML.

That is, the encapsulation layer L14, the color filter layer CFL, andthe touch sensor metal layer TSML are sequentially layered.

As described above, after the entirety of the patterns related to thedisplay function, such as the encapsulation layer L14 and the colorfilter layer CFL, are formed, the touch sensor metals are formed to beproximate to the outermost portion. Then, the distance between the touchpointer of the user to a touch electrode TE corresponding thereto may bereduced, thereby increasing the level of capacitance between the pointerand the corresponding touch electrode TE. Consequently, the accuracy ofthe operation of touch sensing and detecting a touched position can beimproved.

FIG. 20 is a cross-sectional view illustrating a second COE and S-TOEcombination structure in the organic light-emitting display panel 110having a built-in touchscreen according to exemplary embodiments.

Referring to FIG. 20, an overcoat layer OCL is disposed on a colorfilter layer CFL formed by patterning a plurality of color filters CF onan encapsulation layer L14.

In the color filter layer CFL, each of the subpixels SP may have a colorfilter CF disposed therein, the color of the color filter CFcorresponding to the color of the subpixel SP.

For example, when subpixels generating red light, subpixels generatinggreen light, and subpixels generating blue light are disposed in theorganic light-emitting display panel 110 having a built-in touchscreen,red color filters CF_R, green color filters CF_G, and blue color filtersCF_B are disposed in the color filter layer CFL.

Black matrices BM may be respectively located between two adjacentsubpixels SP.

Referring to FIG. 20, as described above, the overcoat layer OCL isdisposed on the color filters CF.

In addition, the touch sensor metals, including the plurality of touchelectrodes TE, the plurality of touch lines TL, and the plurality oftouch pads TP, are disposed on the overcoat layer OCL.

FIG. 21 is a schematic view illustrating the process steps offabricating the second COE and S-TOE combination structure in theorganic light-emitting display panel 110 having a built-in touchscreenaccording to exemplary embodiments.

Referring to FIG. 21, after the encapsulation layer L14 is formed tohave the structure illustrated in FIG. 10, the black matrices BM areformed on boundaries of the subpixels SP.

Afterwards, the color filters CF corresponding to the light-emittingareas of the subpixels SP are patterned.

The encapsulation layer L14, with the color filters CF and the blackmatrices BM patterned thereon, is covered with the overcoat layer OCL.

Afterwards, the touch sensor metal layer TSML is formed on the overcoatlayer OCL.

That is, the touch sensor metals, including the touch electrode TE, thetouch line TL, and the touch pad TP, are formed on the overcoat layerOCL.

As described above, the overcoat layer OCL is formed on the color filterlayer CFL, and the touch sensor metals TE, TL, and TP are formed on theovercoat layer OCL. It is thereby possible to protect the color filterlayer CFL and the patterns below the color filter layer CFL using theovercoat layer OCL. In addition, the overcoat layer OCL can prevent thetouch electrodes TE, the touch lines TL, and the like from electricallyinterfering with electrodes, voltage lines, or signal lines locatedbelow the overcoat layer OCL.

FIG. 22 is a schematic view illustrating the distance T2 defined betweenthe touch electrode TE and the second electrode E2 and a parasiticcapacitance component formed between the touch electrode TE and thesecond electrode E2 in the organic light-emitting display panel 110having a built-in touchscreen according to exemplary embodiments.

Referring to FIG. 22, during the touch mode section, a touch drivingsignal TDS is applied to the touch electrode TE.

Here, a base voltage EVSS is applied to the second electrode E2 (e.g.cathode) of the OLED.

The base voltage EVSS may be a DC voltage having a ground voltage valueor a specific voltage value.

Referring to FIG. 22, the encapsulation layer L14 is disposed betweenthe touch electrode TE and the second electrode E2 of the OLED.

Referring to the structure illustrated in FIG. 17, the encapsulationlayer L14 is disposed between the touch electrode TE and the secondelectrode E2 of the OLED.

Referring to the structure illustrated in FIG. 20, the encapsulationlayer L14 and the overcoat layer OCL are disposed between the touchelectrode TE and the second electrode E2 of the OLED.

Referring to FIG. 22, during the touch mode section, parasiticcapacitance Cpara may be formed between the touch electrode TE to whichthe touch driving signal TDS is applied and the second electrode E2 towhich the base voltage EVSS is applied.

The parasitic capacitance Cpara acts as a load increasing RC delayregarding the touch electrode TE and the touch line TL.

In addition, during the touch mode section, the parasitic capacitanceCpara may change sensing data obtained from a signal received from thetouch electrode TE to which the touch driving signal TDS is applied,thereby forming a touch sensing error.

Accordingly, the organic light-emitting display panel 110 having abuilt-in touchscreen according to exemplary embodiments may have astructural feature able to prevent the parasitic capacitance Cpara. Thisfeature will be described with reference to FIG. 23, FIG. 24, and FIG.25.

FIG. 23 is a schematic view illustrating the distance T1 between thetouch electrode TE and the second electrode E2 in the organiclight-emitting display panel 110 having a built-in touchscreen and afirst COE and S-TOE combination structure, FIG. 24 is a schematic viewillustrating the distance T2 between the touch electrode TE and thesecond electrode E2 in the organic light-emitting display panel 110having a built-in touchscreen and a second COE and S-TOE combinationstructure, and FIG. 25 is a graph illustrating RC delay and touchsensing performance according to the distance T between the touchelectrode TE and the second electrode E2 in the organic light-emittingdisplay panel 110 having a built-in touchscreen according to exemplaryembodiments.

Referring to FIG. 23, in the organic light-emitting display panel 110having a built-in touchscreen and a first COE and S-TOE combinationstructure, the distance T1 between the touch electrode TE and the secondelectrode E2 corresponds to the thickness of the encapsulation layerL14.

Referring to FIG. 24, in the organic light-emitting display panel 110having a built-in touchscreen and a second COE and S-TOE combinationstructure, the distance T2 between the touch electrode TE and the secondelectrode E2 corresponds to a total of the thickness of theencapsulation layer L14 and the thickness of the overcoat layer OCL.

Referring to FIG. 25, in the organic light-emitting display panel 110having a built-in touchscreen and an S-TOE structure, a decrease in thedistance T between the touch electrode TE and the second electrode E2increases the parasitic capacitance Cpara between the second electrodeE2 and the touch electrode TE, thereby increasing RC delay and loweringtouch sensing performance (touch sensitivity).

Referring to FIG. 25, in the organic light-emitting display panel 110having a built-in touchscreen and an S-TOE structure, an increase in thedistance T between the touch electrode TE and the second electrode E2reduces the parasitic capacitance Cpara between the second electrode E2and the touch electrode TE, thereby decreasing RC delay and improvingtouch sensing performance (touch sensitivity).

As described above, the distance T between the touch electrode TE andthe second electrode E2 is equal to or greater than a thresholdthickness T_TH corresponding to maximum allowable RC delay KD andminimum touch sensing performance KP.

Accordingly, in the organic light-emitting display panel 110 having abuilt-in touchscreen in which the first COE and S-TOE combinationstructure illustrated in FIG. 23 is provided, the encapsulation layerL14 is formed to be relatively thick, such that the distance T1 betweenthe touch electrode TE and the second electrode E2 is equal to orgreater than the threshold thickness T_TH.

In the organic light-emitting display panel 110 having a built-intouchscreen in which the second COE and S-TOE combination structureillustrated in FIG. 24 is provided, the encapsulation layer L14 and theovercoat layer OCL is formed to be relatively thick such that thedistance T2 between the touch electrode TE and the second electrode E2is equal to or greater than the threshold thickness T_TH.

For example, the distance T1 between the touch electrode TE and thesecond electrode E2 in the organic light-emitting display panel 110having a built-in touchscreen in which the first COE and S-TOEcombination structure illustrated in FIG. 23 is provided or the distanceT2 between the touch electrode TE and the second electrode E2 in theorganic light-emitting display panel 110 having a built-in touchscreenin which the second COE and S-TOE combination structure illustrated inFIG. 24 is provided may be equal to the distance between the pluralityof touch electrodes TE and the bottom surface of the encapsulation layerL14 (i.e. the top surface of the second electrode E2). Here, thethreshold thickness T_TH may be 5 μm.

That is, the distance between the plurality of touch electrodes TE andthe bottom surface of the encapsulation layer L14 (i.e. the top surfaceof the second electrode E2) may be designed to be equal to or greaterthan 5 μm.

This can consequently reduce RC delay and improve touch sensingperformance.

In addition, each of the high-resistance black matrices BM is disposedbetween two adjacent color filters among the color filters CF in thecolor filter layer CFL. The resistance of the high-resistance blackmatrices BM is equal to or higher than a predetermined level ofresistance.

Due to the high-resistance black matrices BM disposed as describedabove, the touch sensor metals can be reliably disposed within theorganic light-emitting display panel 110 including an organic material.

As described above, the distance between the second electrode E2 and thetouch electrode TE (i.e. the distance between the bottom surface of theencapsulation layer L14 and the touch electrode TE) is designed to beequal to or greater than a predetermined value T_TH of, for example, 5μm, whereby the parasitic capacitance Cpara can be prevented from beingformed between the second electrode E2 and the touch electrode TE.

As described above, the structural design change (e.g. the changedthickness) can prevent the parasitic capacitance Cpara from being formedbetween the second electrode E2 and the touch electrode TE.Alternatively, load-free driving performed during the touch mode sectioncan prevent the parasitic capacitance Cpara from being formed betweenthe second electrode E2 and the touch electrode TE.

FIG. 26 is a schematic view illustrating load-free driving for removinga parasitic capacitance component from the organic light-emittingdisplay device 100 having a built-in touchscreen according to exemplaryembodiments.

As illustrated in FIG. 26, during the touch mode section, the organiclight-emitting display device 100 having a built-in touchscreenaccording to exemplary embodiments performs load-free driving ofapplying a load-free driving signal LFDS to the second electrode E2 toreduce the potential difference between the second electrode E2 and thetouch electrode TE, thereby being able to prevent parasitic capacitanceCpara from being formed between the second electrode E2 and the touchelectrode TE.

Here, the load-free driving signal LFDS may be a signal identical to thetouch driving signal TDS or a signal corresponding to the touch drivingsignal TDS.

When the load-free driving signal LFDS is identical to the touch drivingsignal TDS, at least one of the frequency, phase, and amplitude of theload-free driving signal LFDS may be identical to a corresponding one ofthe frequency, phase, and amplitude of the touch driving signal TDS.

While the load-free driving signal LFDS and the touch driving signal TDSare being transferred in the organic light-emitting display panel 110having a built-in touchscreen, signal characteristics may be changed dueto, for example, signal amplitude attenuation. The degree of change mayvary according to positions.

In this regard, the signal output characteristics of the organiclight-emitting display device 100 having a built-in touchscreen can becontrolled such that at least one of the frequency, phase, and amplitudeof the load-free driving signal LFDS becomes identical to acorresponding one of the frequency, phase, and amplitude of the touchdriving signal TDS at a point at which the load-free driving signal TDSis actually applied to the second electrode E2 and a point at which thetouch driving signal TDS is actually applied to the touch electrode TE.

Thus, when the signal output characteristics of the load-free drivingsignal LFDS and the touch driving signal TDS are controlled by a signaloutput configuration such that at least one of the frequency, phase, andamplitude of the load-free driving signal LFDS becomes identical to acorresponding one of the frequency, phase, and amplitude of the touchdriving signal TDS at the point at which the load-free driving signalLFDS is actually applied to the second electrode E2 and the point atwhich the touch driving signal TDS is actually applied to the touchelectrode TE, at least one of the frequency, phase, and amplitude of theload-free driving signal TDS may differ from a corresponding one of thefrequency, phase, and amplitude of the touch driving signal TDS at apoint at which the load-free driving signal LFDS and the touch drivingsignal TDS are output.

According to the exemplary embodiments as set forth above, the organiclight-emitting display panel 110 having a built-in touchscreen and theorganic light-emitting display device 100 having a built-in touchscreenare provided with a structure enabling a touchscreen panel (i.e. touchsensor metals) to be disposed therewithin.

In addition, according to the exemplary embodiments, the organiclight-emitting display panel 110 having a built-in touchscreen and theorganic light-emitting display device 100 having a built-in touchscreencan improve touch sensing performance.

Furthermore, according to the exemplary embodiments, the organiclight-emitting display panel 110 having a built-in touchscreen and theorganic light-emitting display device 100 having a built-in touchscreenare provided with a structure enabling an ultrathin profile to bedesigned.

In addition, according to the exemplary embodiments, the organiclight-emitting display panel 110 having a built-in touchscreen and theorganic light-emitting display device 100 having a built-in touchscreenare provided with a touchscreen panel (i.e. touch sensor metals)disposed therewithin without display performance being influenced.

Furthermore, according to the exemplary embodiments, the organiclight-emitting display panel 110 having a built-in touchscreen and theorganic light-emitting display device 100 having a built-in touchscreenare provided with an S-TOE structure in which two touch sensor metals(touch electrodes and touch lines) are disposed in the same layer, thetouch sensor metals enabling self-capacitance based touch sensing.

The foregoing descriptions and the accompanying drawings have beenpresented in order to explain the certain principles of the presentdisclosure. A person skilled in the art to which the disclosure relatescould make many modifications and variations by combining, dividing,substituting for, or changing the elements without departing from theprinciple of the disclosure. The foregoing embodiments disclosed hereinshall be interpreted as illustrative only but not as limitative of theprinciple and scope of the disclosure. It should be understood that thescope of the disclosure shall be defined by the appended Claims and allof their equivalents fall within the scope of the disclosure.

What is claimed is:
 1. An organic light-emitting display devicecomprising: an organic light-emitting display panel having a built-intouchscreen, wherein the organic light-emitting display panel comprises:a plurality of subpixels defined by a plurality of data lines and aplurality of gate lines, an electrode applied with a load-free drivingsignal, an encapsulation layer on the plurality of subpixels anddisposed on the electrode and including at least one inorganic layer andat least one organic layer, a dam stacked higher than a portion of theencapsulation layer surrounding the dam, a plurality of touch electrodesand a plurality of touch lines electrically connected to the pluralityof touch electrodes, the plurality of touch electrodes and the pluralityof touch lines on the encapsulation layer, a plurality of touch pads atends of the plurality of touch lines and electrically connected to theplurality of touch lines, an overcoat layer covering the plurality oftouch electrodes but exposing at least a part of the plurality of touchpads, and a color filter layer located on the overcoat layer, whereinthe color filter layer comprises a first color filter and a second colorfilter adjacent to the first color filter, and a black matrix disposedbetween the first color filter and the second color filter, wherein theblack matrix is disposed on the overcoat layer, and wherein at least oneof the first color filter and the second color filter is disposed on atleast a portion of the black matrix; and a touch sensing circuitelectrically connected to the plurality of touch pads, the touch sensingcircuit supplying a touch driving signal to at least one touch electrodeamong the plurality of touch electrodes through the plurality of touchpads and sensing at least one of a touch and a touched position based ona touch sensing signal detected using each of the plurality of touchelectrodes to which the touch driving signal is applied, wherein atleast one of a frequency, phase, and amplitude of the load-free drivingsignal is identical to one of a frequency, phase, and amplitude of thetouch driving signal when the load-free driving signal is applied to theelectrode and when the touch driving signal is applied to the at leastone touch electrode in order to drive the at least one touch electrode,wherein the load-free driving signal is a signal identical to the touchdriving signal or a signal corresponding to the touch driving signal,wherein at least a part of the dam is formed from extending theencapsulation layer, and overlaps at least a part of at least one of theplurality of data lines, and wherein the encapsulation layer, theplurality of data lines, the plurality of touch electrodes, theplurality of touch lines, and the plurality of touch pads are formed ona same substrate.
 2. The organic light-emitting display device accordingto claim 1, wherein the plurality of touch electrodes and the pluralityof touch lines are disposed in a same layer.
 3. The organiclight-emitting display device according to claim 2, wherein theplurality of touch lines do not overlap with the plurality of touchelectrodes.
 4. The organic light-emitting display device according toclaim 1, wherein each of the plurality of touch electrodes comprises abulk-type transparent electrode without an open area.
 5. The organiclight-emitting display device according to claim 1, wherein each of theplurality of touch electrodes comprises a mesh-type transparent oropaque electrode having an open area.
 6. The organic light-emittingdisplay device according to claim 1, wherein a size of each of theplurality of touch electrodes is greater than a size of each of theplurality of subpixels.
 7. The organic light-emitting display deviceaccording to claim 6, wherein two or more gate lines among the pluralityof gate lines or two or more data lines among the plurality of datalines are disposed in an area occupied by each of the plurality of touchelectrodes.
 8. The organic light-emitting display device according toclaim 1, wherein the overcoat layer is formed on the encapsulationlayer, covers the plurality of touch electrodes, the plurality of touchlines, and the plurality of touch pads, but partially exposes each ofthe plurality of touch pads.
 9. The organic light-emitting displaydevice according to claim 8, wherein the touch sensing circuit iselectrically connected to the partially exposed portion of each of theplurality of touch pads.
 10. The organic light-emitting display deviceaccording to claim 1, further comprising: a gate layer on which a gateelectrode is formed, the gate layer being formed on the substrate, agate insulating film directly located on the gate layer, and a source ordrain layer directly located on the gate insulating film, and on which asource or drain electrode and at least one of the plurality of datalines are directly formed.
 11. An organic light-emitting display panelcomprising: a plurality of subpixels defined therein by a plurality ofdata lines and a plurality of gate lines, wherein each of the pluralityof subpixels comprises: an organic light-emitting diode comprising afirst electrode, an organic light-emitting layer, and a secondelectrode, wherein a load-free driving signal is applied to the secondelectrode, a driving transistor driving the organic light-emittingdiode, a first transistor electrically connected between a first node ofthe driving transistor and a data line among the plurality of data linescorresponding thereto, and a storage capacitor electrically connectedbetween the first node and a second node of the driving transistor; anencapsulation layer located on each of the second electrodes of theorganic light-emitting diodes of the plurality of subpixels, andincluding at least one inorganic layer and at least one organic layer; adam stacked higher than a portion of the encapsulation layer surroundingthe dam; a plurality of touch electrodes and a plurality of touch lineselectrically connected to the plurality of touch electrodes, theplurality of touch electrodes and the plurality of touch lines locatedon the encapsulation layer; a plurality of touch pads at ends of theplurality of touch lines and electrically connected to the plurality oftouch lines, the plurality of touch pads electrically connected to atouch sensing circuit; an overcoat layer covering the plurality of touchelectrodes but exposing at least a part of the plurality of touch pads;a color filter layer located on the overcoat layer, wherein the colorfilter layer comprises a first color filter and a second color filteradjacent to the first color filter, and a black matrix disposed betweenthe first color filter and the second color filter, wherein the blackmatrix is disposed on the overcoat layer, and wherein at least one ofthe first color filter and the second color filter is disposed on atleast a portion of the black matrix, wherein a touch driving signalgenerated from the touch sensing circuit is supplied to at least onetouch electrode among the plurality of touch electrodes through theplurality of touch pads, wherein the touch electrode to which the touchdriving signal is applied forms capacitance together with a pointercorresponding to a touch operation means of a user, wherein at least oneof a frequency, phase, and amplitude of the load-free driving signal isidentical to one of a frequency, phase, and amplitude of the touchdriving signal when the load-free driving signal is applied to thesecond electrode and when the touch driving signal is applied to the atleast one touch electrode in order to drive the at least one touchelectrode, wherein the load-free driving signal is a signal identical tothe touch driving signal or a signal corresponding to the touch drivingsignal, wherein at least a part of the dam is formed from extending theencapsulation layer, and overlaps at least a part of at least one of theplurality of data lines, and wherein the encapsulation layer, theplurality of data lines, the plurality of touch electrodes, theplurality of touch lines, and the plurality of touch pads are formed ona same substrate.
 12. The organic light-emitting display panel accordingto claim 11, wherein the plurality of touch electrodes and the pluralityof touch lines are disposed in a same layer.
 13. The organiclight-emitting display panel according to claim 12, wherein theplurality of touch lines do not overlap with the plurality of touchelectrodes.
 14. The organic light-emitting display panel according toclaim 11, wherein a distance between the plurality of touch electrodesand a bottom surface of the encapsulation layer is equal to or greaterthan 5 μm.
 15. The organic light-emitting display panel according toclaim 11, further comprising a black matrix disposed between twoadjacent color filters in the color filter layer, a resistance of theblack matrix equal to or higher than a predetermined level ofresistance.
 16. The organic light-emitting display panel according toclaim 11, wherein the overcoat layer is formed on the encapsulationlayer, covers the plurality of touch electrodes, the plurality of touchlines, and the plurality of touch pads, but partially exposes each ofthe plurality of touch pads.
 17. The organic light-emitting displaypanel according to claim 16, wherein the touch sensing circuit iselectrically connected to the partially exposed portion of each of theplurality of touch pads.
 18. The organic light-emitting display panelaccording to claim 11, further comprising: a gate layer on which a gateelectrode is formed, the gate layer being formed on the substrate, agate insulating film directly located on the gate layer, and a source ordrain layer directly located on the gate insulating film, and on which asource or drain electrode and at least one of the plurality of datalines are directly formed.